Jakarta. Indonesia's House of Representatives Speaker Setya Novanto failed to attend an interrogation as a suspect in the multimillion-dollar e-KTP graft case on Monday (11/09), citing health issues.

The interrogation was ordered by the Corruption Eradication Commission (KPK) last week.

Setya, who is also the chairman of the Golkar Party, was not able to go to the interrogation due to health problems he suffered after exercising on Sunday, Golkar Secretary General Idrus Marham said.

"Medical test results showed a rise in [Setya's] blood sugar level, which is impacting his kidney and heart functions," Idrus, accompanied by Setya’s lawyers, told the press at KPK headquarters in South Jakarta on Monday morning.

Idrus said they had submitted a doctor's certificate to the KPK as proof of Setya’s illness.

"We delivered a letter and a doctor's certificate which explains why Setya was unable to attend this interrogation," Idrus said.

KPK investigators have questioned around 100 witnesses in the case against Setya, who was quick to deny any wrongdoing.

Setya lodged a pretrial request with the South Jakarta District Court last week in a bid to revoke his status as suspect.

Today’s interrogation at the KPK was scheduled one day before the first session of Setya's pretrial.

Setya stands accused of having received around Rp 575 billion ($44 million) in kickbacks from the electronic ID card project.

He could face up to 20 years in jail and a maximum fine of Rp 1 billion if found guilty.

Massive corruption in the Rp 5.9 trillion project, launched by the Home Affairs Ministry in 2011, resulted in around Rp 2.3 trillion in state losses.

Former Home Affairs Ministry officials Irman and Sugiharto, businessman Andi Agustinus and another Golkar lawmaker, Markus Nari, are the other suspects in the case.